Stage photo of work of Zhang Yishan, fourth fourth graduate (the picture comes from Oriental IC)Stage photo of work of Zhang Yishan, fourth fourth graduate (the picture comes from Oriental IC)Stage photo of work of Zhang Yishan, fourth fourth graduate (the picture comes from Oriental IC)Stage photo of work of Zhang Yishan, fourth fourth graduate (the picture comes from Oriental IC)Stage photo of work of Zhang Yishan, fourth fourth graduate (the picture comes from Oriental IC)Stage photo of work of Zhang Yishan, fourth fourth graduate felt fierce explore case on April 13 (the picture comes from Oriental IC)